has been talking to syria's neighbors including israel, about how to keep those weapons out of the hands of terrorists. syria's civil war began as avi popular uprising. the u.n. says more than 600,000 refugees have fled. many have gone to turkey, andne clarissa ward is there. >> reporter: this may look like a basement storefront, but hidden inside is a school for 500 children, all of them refugees from syria's civil war. we visited an english class... hello. >> hello! >> reporter: ...where we met 13- year-old omar. where are you from, omar? >> i'm from aleppo. >> reporter: from aleppo. >> yes. >> reporter: aleppo, syria's largest city, has been pounded for months by the syrian air force. whole neighborhoods have been reduced to rubble. when the fighting got too close, omar and his family fled across the border to turkey. why did you come here? >> because bashar assad destroyed all of syria and we come here to have a life, good life. >> reporter: another boy, ali, told us that he lost both of his hands and his left eye when a plane bombed his house. in a math class, we wanted to know how